JP2022135467A - Panel lifting device - Google Patents

Abstract

To provide a panel lifting device capable of lifting a panel easily and safely.SOLUTION: A panel lifting device includes a lifting cord, a panel, an operation part and a speed reduction mechanism. The panel is connected to the lifting cord, and lifted by operating the operation part to move the lifting cord. The panel can descend by self-weight. The speed reduction mechanism is constituted so as to reduce self-weight descending speed of the panel.SELECTED DRAWING: Figure 1

Description

The present invention relates to a panel lifting device.

At retail store checkout counters and bank counters where face-to-face customer service is provided, panels and films are installed to physically block the gap between store clerks and customers to prevent droplet infection as part of measures against infectious diseases. may occur. Patent Literature 1 discloses a droplet infection prevention film device in which a transparent film is suspended from a ceiling or the like by a suspension wire.

Utility Model Registration No. 3227065

When goods are delivered through a panel installed between a store clerk and a customer, it is necessary to temporarily move the panel for delivery, and then return the panel to its original position after the delivery is completed. . If the panel can be raised and lowered, the panel is lifted to create a gap below that communicates the space between the store clerk and the customer, the product is delivered through the gap, and the panel is lowered after the delivery is completed. Even when this is frequently performed, it is possible to easily secure a gap of the minimum required size for the minimum required time.

On the other hand, the panel is installed in a position between people and close to people, and it is assumed that it will be used in a situation where it is frequently moved up and down. It is necessary to pay attention to safety.

SUMMARY OF THE INVENTION The present invention has been made in view of such circumstances, and provides a panel lifting device capable of lifting and lowering a panel easily and safely.

According to the present invention, the panel lifting device includes a lifting cord, a panel, an operation unit, and a reduction mechanism. , the panel can be lowered by its own weight, and the speed reduction mechanism is configured to reduce the speed of lowering of the panel by its own weight.

In the panel lifting device according to the present invention, the panel connected to the lifting cord can be lifted and lowered by operating the operation unit, and the panel's own weight lowering speed can be reduced by the reduction mechanism. With such a configuration, the panel can be easily moved up and down, and the panel can be safely moved up and down because the panel moves down relatively slowly.

Various embodiments of the present invention are illustrated below. The embodiments shown below can be combined with each other.
Preferably, said panel is a transparent panel.
Preferably, the panel lifting device further includes upper limit position determination means for determining the upper limit position of the panel in the vertical direction.
Preferably, the panel lifting device further includes a head box, one end of the lifting cord is suspended from the head box and connected to the panel, and the upper limit position determination means is on the lifting cord, A stopper is provided between the headbox and the one end, and the stopper is configured to contact the headbox when the panel is raised to the upper limit position.
Preferably, the elevating cord includes a lower elevating cord having one end connected to the panel and including the one end, and an upper elevating cord disposed above the lower elevating cord. and the upper lift cord are separably connected.
Preferably, the panel lifting device further includes lower limit position determination means for determining a lower limit position of the panel in the vertical direction.
Preferably, the lifting cord includes lower limit position adjusting means for adjusting the lower limit position of the panel in the vertical direction.

BRIEF DESCRIPTION OF THE DRAWINGS It is a front view which shows the panel raising/lowering apparatus 1 which concerns on 1st Embodiment of this invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a side view which shows the panel raising/lowering apparatus 1 which concerns on 1st Embodiment of this invention. FIG. 4 is a diagram showing a state in which the panel 4 is lifted in the panel lifting device 1 according to the first embodiment of the present invention; 1 is a front perspective view of a speed reduction mechanism 100 according to a first embodiment of the invention; FIG. 1 is a rear perspective view of a speed reduction mechanism 100 according to a first embodiment of the invention; FIG. Fig. 2 is a left side view of the speed reduction mechanism 100 according to the first embodiment of the present invention; 1 is an exploded perspective view of a speed reduction mechanism 100 according to a first embodiment of the present invention, viewed from the front upper side; FIG. 1 is an exploded perspective view of a speed reduction mechanism 100 according to a first embodiment of the present invention, viewed from the lower rear side; FIG. 1 is a front perspective view of a reduction gear mechanism 100 according to a first embodiment of the present invention with a case 10 removed; FIG. FIG. 10 is a front perspective view of FIG. 9 with the slider 220 further removed; It is a front perspective view showing case 10 concerning a 1st embodiment of the present invention. 2 is a front perspective view of a slider 220 according to the first embodiment of the invention; FIG. FIG. 7 is a cross-sectional view taken along line AA of FIG. 6; 1 is a cross-sectional view in the left-right direction of a speed reduction mechanism 100 according to a first embodiment of the present invention; FIG. FIG. 4 is an exploded perspective view of a portion of the case 10 above the flange portion 13, the slider 220, and the coil spring SP according to the first embodiment of the present invention, as seen from the back side; 16A and 16B are conceptual diagrams for explaining the relationship of forces applied to the lifting cords when the panel is lowered. 4 is a plan view of lower limit position adjusting means 20 according to the first embodiment of the present invention; FIG. FIG. 18 is a cross-sectional view taken along line BB of FIG. 17; 19A to 19D are explanatory diagrams of the procedure for adjusting the length of the lifting cord by the lower limit position adjusting means 20. FIG. It is a front view which shows the panel raising/lowering apparatus 1 which concerns on 2nd Embodiment of this invention. It is a figure which shows the state in which the panel 4 which concerns on 2nd Embodiment of this invention reached|attained the upper limit position. FIG. 22A is a diagram showing a state in which the lower lifting cord 3a and the upper lifting cord 3b are separated. FIG. 22B is a diagram showing a state in which the lower lifting cord 3a and the upper lifting cord 3b are connected.

Embodiments of the present invention will be described below with reference to the drawings. Various features shown in the embodiments shown below can be combined with each other. In addition, the invention is established independently for each characteristic item.

1. First Embodiment 1.1. Overall Configuration A panel lifting device 1 according to the first embodiment, as shown in FIG. 1, is installed above a stand 6 used for customer service at a checkout counter or the like of a retail store. The panel lifting device 1 includes a head box 2, a lifting cord 3, a panel 4, and an operation unit 8. The panel 4 supported by the lifting cord 3 suspended from the head box 2 is lifted and lowered by the operation of the operation unit 8. configured as possible. When referring to FIG. 1 in the following description, the horizontal direction in FIG. 1 is referred to as the width direction.

As shown in FIGS. 1 and 2, the head box 2 is suspended from the lifting cords 3 , and one end of each lifting cord 3 is connected to the panel 4 . Each lifting cord 3 is guided in the width direction of the headbox 2 by a plurality of support members 5 arranged inside the headbox 2, passes through a lock portion 9 and a speed reduction mechanism 100 mounted inside the headbox 2, and moves to the other end. is pulled out from the end of the headbox 2 . The other end of each lift cord 3 pulled out is connected to a cord equalizer 7 . The number of lifting cords 3 can be arbitrarily set according to the size and weight of the panel 4, and it is preferable to use a plurality of lifting cords 3 in order to support the panel 4 stably. In this embodiment, two lifting cords 3 are used.

The code equalizer 7 is connected to an operation unit 8 having an operation code 81 and an operation equalizer 82 . An operation cord 81 hangs down from the cord equalizer 7 and has an operation equalizer 82 connected to its lower end. When the operating portion 8 is pulled downward, each lifting cord 3 moves in its longitudinal direction and is pulled out from the head box 2 as shown in FIG.

The lock portion 9 is configured to be able to lock the lifting cord 3 in order to prevent the panel 4 from dropping under its own weight, and in this embodiment, a known heart cam stopper is used. In the lock part 9, when the operation part 8 is once pulled downward from the locked state and the hand is released, the lifting cord 3 is unlocked and can be moved in the longitudinal direction, and as a result, the panel 4 can be lowered by its own weight. In this state, when the operation part 8 is pulled downward again and released, the lifting cord 3 is locked immediately after the panel 4 slightly lowers by its own weight, and further lowering of its own weight is restrained.

The deceleration mechanism 100 is mounted inside the head box 2 and brakes the movement of the lifting cord 3 to reduce the speed of the panel 4 descending under its own weight. Details of the speed reduction mechanism 100 will be described later.

The flat panel 4 is for shielding between the store clerk and the customer, and it is preferable to use a transparent or translucent panel in order to ensure visibility from both sides of the panel 4 . As the transparent panel, for example, a panel made of polycarbonate or acrylic can be used. The dimensions of the panel 4 can be appropriately set according to the conditions such as the installation location, and are, for example, 0.30 to 2 m in width, 0.3 to 1.5 m in height, and 1 to 7 mm in thickness, but are limited to these. not to be

As shown in FIGS. 1 and 2, an insertion hole 4a having a diameter of 3 mm to 5 cm is formed near the upper edge of the panel 4. As shown in FIG. The panel 4 is connected to and supported by the lifting cord 3 by inserting one end of the lifting cord 3 into the insertion hole 4a and binding it. The number of insertion holes 4a and their positions in the width direction can be appropriately set according to conditions such as the number of lifting cords 3 and the size of the panel 4. In this embodiment, two insertion holes 4a are provided in the panel 4. They are formed at positions approximately 1/3 and 2/3 of the length in the width direction from the left end.

1.2. Reduction mechanism 100
The deceleration mechanism 100 is configured to provide resistance to longitudinal movement of the lifting cord 3 when the panel 4 is lowered by its own weight. As a result, the lowering speed of the panel 4 is reduced, and the panel 4 can be lowered slowly and safely. In order to apply resistance, for example, a centrifugal governor that utilizes centrifugal force generated as the rotating shaft rotates, or an oil damper that utilizes resistance generated when a member moves in a viscous fluid can be used. The speed reduction mechanism 100 according to this embodiment is configured to apply resistance to the movement of the lifting cord 3 when the panel 4 is lowered by its own weight by means of a centrifugal governor.

As shown in FIGS. 4 to 8, the speed reduction mechanism 100 according to the present embodiment is constructed by connecting a motion converting portion DT and a resistance applying portion RA in a substantially vertical direction. The motion converter DT is for converting the movement of the lifting cord 3 into rotational motion. The idle roller 40 , the carrier 260 with internal teeth, and a part of the case 10 . The resistance applying part RA is for applying resistance to the rotational movement, and is composed of the weight 340 , the weight holder with sun gear 320 , the washer 241 , the base 70 , and part of the case 10 . In the following description, the front/rear, left/right, and up/down directions of the speed reduction mechanism 100 are defined as shown in FIG. In the panel lifting device 1 of FIG. 1 , the speed reduction mechanism 100 is arranged so that the front side faces the left side in the width direction of the head box 2 and the rear side faces the right side in the width direction of the head box 2 .

<Aligning member 200>
As shown in FIGS. 4 and 5 , the aligning member 200 arranges or inserts the lifting cords 3 along the front-rear direction, thereby aligning the orientation of the lifting cords 3 . The alignment member 200 can be made of resin such as plastic, for example. In this embodiment, one lifting cord 3 is arranged in the front-rear direction above the alignment member 200, and two lifting cords 3 are inserted in the front-rear direction inside the alignment member 200. You can adjust the orientation of the code 3. Although three lifting cords 3 are shown in FIGS. 4 and 5 to explain the positions where the lifting cords 3 are arranged, there are actually two lifting cords 3 used in this embodiment. be. When the number of the lifting cords 3 is two, the lifting cords 3 can be arranged at any two of the three positions shown in FIGS. 4 and 5 .

Claws (not shown) are provided on the inner surfaces of the left and right side walls of the aligning member 200. When the speed reduction mechanism 100 is assembled, the claws are engaged with engagement holes 19 (see FIG. 11) provided on the left and right sides of the case 10. Alignment member 200 is fixed to case 10 by mating.

<Case 10>
As shown in FIGS. 4 to 6 and 11, the case 10 constitutes a housing together with the base 70, and has therein a slider 220, a coil spring SP, an idle roller 40 composed of a shaft core 41 and a roller portion 42, Knurl 240 , pinion gear 50 , shaft core 31 , washer 241 , carrier 260 with internal teeth, planetary gear 280 , plate 300 , weight holder with sun gear 320 and weight 340 are held.

As shown in FIGS. 11 and 15, the case 10 includes a top wall portion 11, a front wall portion 12f, a right wall portion 12r, a left wall portion 12l, a rear wall portion 12b, a front wall portion 12f, and a rear wall portion. A collar portion 13 extending radially from the side wall portion 12b, the front wall portion 12f, and the left side wall portion 12l, a cylindrical portion 13C connected to the collar portion 13, and a cover portion 112 connected to the cylindrical portion 13C. and as a main configuration.

Guide grooves 113 facing each other in the front-rear direction are formed in the front wall portion 12f and the rear wall portion 12b. The lifting cord 3 is inserted through the guide groove 113 in the front-rear direction.

The right side wall portion 12r and the left side wall portion 12l are provided with engagement holes 19 configured to be engageable with the claw portions of the alignment member 200. As shown in FIG. Support grooves 114 are provided above the left and right engaging holes 19 . As shown in FIGS. 4 and 5, the support groove 114 supports the projection 230 provided on the slider 220 when the case 10 holds the slider 220 inside. As a result, the slider 220 can be supported with its bottom part floating.

A first ceiling wall groove 16 and a second ceiling wall groove 17 are formed in the ceiling wall portion 11 . The first ceiling wall groove 16 and the second ceiling wall groove 17 are formed obliquely with respect to the longitudinal direction of the lifting cord 3, that is, the front-rear direction. It is configured such that the distance between the first ceiling wall groove 16 and the second ceiling wall groove 17 is small. Further, the first ceiling wall groove 16 is formed in an arc shape, and the arc of the first ceiling wall groove 16 is concentric with the inner peripheral surface of the carrier 260 with internal teeth shown in FIG. 10 in a plan view. formed in On the other hand, the second ceiling wall groove 17 has a substantially linear shape on the front side, and curves away from the first ceiling wall groove 16 toward the rear.

A first guide wall 16 a protruding upward from the first ceiling wall groove 16 is provided at the outer edge of the case 10 in the first ceiling wall groove 16 . The first guide wall 16 a is provided to increase the contact area with the shaft core 31 moving along the first ceiling wall groove 16 and reduce the surface pressure of the shaft core 31 . A second guide wall 17 a protruding upward from the second ceiling wall groove 17 is provided at the outer edge of the case 10 in the second ceiling wall groove 17 . The second guide wall 17 a is provided to increase the contact area with the shaft core 41 moving along the second top wall groove 17 and reduce the surface pressure of the shaft core 41 . With such a configuration, it is possible to prevent the inner surfaces of the first ceiling wall groove 16 and the second ceiling wall groove 17 from being scraped.

The cover portion 112 has two first engaging grooves 111a on each of its left and right side surfaces, two second engaging grooves 111b on its front end, and one second engaging groove 111b on substantially the center of its rear end. be provided. The first engagement groove 111a engages the first engagement plate portion 701a of the base 70 shown in FIG. 9, and the second engagement groove 111b engages the second engagement plate portion 701b of the base 70. As shown in FIG. Thereby, the case 10 and the base 70 are engaged to form a housing.

Inside the case 10, as shown in FIG. 13, a ring-shaped inner peripheral gear 115 that meshes with the planetary gear 280 is formed. 15, four grooves 118 are formed on the left and right inner surfaces of the case 10. As shown in FIG. The groove 118 is for passing the protrusion 230 of the slider 220 when assembling or disassembling the reduction mechanism 100 .

<Slider 220>
The slider 220 corresponds to a holding member that holds the idle roller 40 and the knurls 240 inside and moves together with the idle rollers 40 and the knurls 240 . As shown in FIGS. 12 and 15 , the slider 220 has a top wall portion 221 , a rear wall portion 222 , a front wall portion 224 and a bottom wall portion 223 .

A linear first ceiling wall groove 226 and a second ceiling wall groove 227 are formed in the ceiling wall portion 221 to extend in the left-right direction. Further, the bottom wall portion 223 is formed with a linear first bottom wall groove 228 and a second bottom wall groove 229 extending in the left-right direction. The first bottom wall groove 228 vertically faces the first ceiling wall groove 226 , and the second bottom wall groove 229 vertically faces the second ceiling wall groove 227 . The widths of the first ceiling wall groove 226 and the first bottom wall groove 228 are large enough to accommodate the diameter of the shaft core 31, and the widths of the second ceiling wall groove 227 and the second bottom wall groove 229 are large enough to accommodate the diameter of the shaft core 31. 41 can be accommodated.

Further, projections 230 are provided at the four corners of the ceiling wall portion 221 . As described above, the protrusions 230 are accommodated in the support grooves 114 of the case 10, thereby supporting the slider 220 inside the case 10 in a floating state. Thereby, the slider 220 is held in a non-contact state with the carrier 260 with internal teeth located below.

A through hole 225 is formed in each of the front wall portion 224 and the rear wall portion 222 . Although the shape of the hole is arbitrary, the shape is preferably such that a plurality of lifting cords 3 can be inserted vertically aligned.

Further, concave portions 231 are formed on both sides of the through hole 225 of the rear wall portion 222 . A coil spring SP can be arranged in one or both of the left and right recessed portions 231 , and in this embodiment, the coil spring SP is arranged in the left recessed portion 231 . One end of the coil spring SP disposed in the recess 231 protrudes from the recess 231 and contacts the rear inner wall 15d of the case 10 to bias the slider 220 forward.

The width (W1) of the slider 220 having such a shape in the left-right direction is determined by the distance between the inner walls of the case 10 in the left-right direction after providing a clearance that allows the slider 220 to fit into the case 10 . (W2) is set substantially the same. On the other hand, the size (D1) of the slider 220 in the front-rear direction is made smaller than the distance (D2) between the inner walls of the case 10 in the front-rear direction. Therefore, when the slider 220 is arranged in the space of the case 10, the side surfaces of the top wall portion 221 and the bottom wall portion 223 of the slider 220 abut against the inner wall surface 12a in the lateral direction of the case 10, and the slider 220 moves toward the case 10. Movement is restricted in the left and right direction with respect to In this state, the guide groove 113 of the case 10 and the through hole 225 of the slider 220 are aligned in the longitudinal direction, and the lift cord 3 can be inserted into the slider 220 through these. On the other hand, a gap is generated in the front-rear direction between the slider 220 and the inner wall surface of the case 10 , and the slider 220 can move in the front-rear direction with respect to the case 10 . Also, with the slider 220 arranged in the space of the case 10 , the coil spring SP protruding from the recess 231 of the rear wall portion 222 of the slider 220 presses the rear inner wall 15 d of the case 10 . Therefore, the slider 220 is positioned in front of the case 10 while the slider 220 is arranged in the space of the case 10 .

<Tension Transmission Roller 30, Idle Roller 40, and Pinion Gear 50>
As shown in FIG. 7 , the tension transmission roller 30 has a shaft core 31 and knurls 240 covering the outer peripheral surface of the shaft core 31 . A pinion gear 50 is inserted into the other end of the shaft core 31 . The idle roller 40 has an axis 41 parallel to the axis 31 of the tension transmission roller 30 and a roller portion 42 covering the outer peripheral surface of the axis 41 . Therefore, the rotation axis of the tension transmission roller 30 and the rotation axis of the idle roller 40 are parallel to each other. Both ends of the shaft core 41 are exposed from the roller portion 42 . The knurls 240 and the roller portion 42 are held inside the slider 220 . Also, the pinion gear 50 is held outside the slider 220 .

<Internally toothed carrier 260 and planetary gear 280>
The internally toothed carrier 260 is an annular member in plan view and includes a cylindrical portion 264 and a flange 262 as shown in FIGS. An internal gear 261 that meshes with the pinion gear 50 is formed on the inner peripheral surface inside the cylindrical portion 264 . A support shaft 263 that protrudes downward in the vertical direction is formed on the flange 262 . In this embodiment, as an example, four support shafts 263 are provided.

A planetary gear 280 is rotatably supported on each of the support shafts 263 . The planetary gear 280 meshes with a sun gear 323 (to be described later) and an inner peripheral gear 115 provided inside the case 10 . Then, it is possible to revolve around the central portion of the internal gear 261 . Therefore, when the rotation of the pinion gear 50 is transmitted to the internal gear 261, the carrier 260 with internal teeth rotates, and accordingly, the carrier 260 with internal teeth is rotatably supported by the support shaft 263 provided on the flange 262 of the carrier 260 with internal teeth. The rotation of the planetary gear 280 can accelerate the rotation caused by the pinion gear 50 .

<Weight Holder with Sun Gear 320 and Weight 340>
As shown in FIGS. 7, 8, and 13, the weight holder 320 with sun gear is formed with convex portions 321 and concave portions 322 alternately arranged toward the outside of a ring-shaped ring portion 324 . A sun gear 323 that meshes with the planetary gear 280 is provided on the outer peripheral surface of the ring portion 324 so that its rotation axis is oriented substantially perpendicularly to the extending direction of the convex portion 321 . A weight 340 is arranged in the recess 322 . Although the number of weights 340 is arbitrary, it is preferable that the weights 340 are evenly spaced from the viewpoint of balance during rotation. In this embodiment, eight weights 340 are used as an example.

When the pinion gear 50 rotates, the weight 340 moves away from the center of the internal gear 261 due to centrifugal force and comes into contact with the inner peripheral wall of the case 10 to act as a centrifugal brake to provide resistance to the rotation. It is given. As shown in FIG. 14, each weight 340 is provided with a protrusion 341 on the base 70 side. The protrusion 341 can reduce the resistance when contacting the base 70 .

<Base 70>
As shown in FIGS. 7 and 8, a columnar portion 708 is provided approximately in the center of the base 70 . A first base groove 706 and a second base groove 707 are provided on the upper surface of the cylindrical portion 708 at positions facing the first ceiling wall groove 16 and the second ceiling wall groove 17, respectively. The shapes of the first base groove 706 and the second base groove 707 correspond to the shapes of the first ceiling wall groove 16 and the second ceiling wall groove 17, respectively. The lower end of the shaft core 31 and the lower end of the shaft core 41 are inserted through the first base groove 706 and the second base groove 707, respectively.

4 and 5, the base 70 has two first engaging plate portions 701a on the left and right side surfaces, two second engaging plate portions 701b on the front side surface, and two second engaging plate portions 701b on the rear side surface. One second engaging plate portion 701b is provided substantially in the center. As described above, these engage with the first engaging groove 111a and the second engaging groove 111b of the case 10. As shown in FIG.

As shown in FIGS. 6 and 14, a mounting cylinder 702 is provided on the bottom surface of the base 70 . When disposing the speed reduction mechanism 100 in the head box 2 , positioning can be performed by fitting the mounting cylinder 702 to a member such as a shaft provided in the head box 2 .

<Assembly of Reduction Mechanism 100>
As shown in FIG. 4, the speed reduction mechanism 100 has a housing to which the case 10 and the base 70 are connected, and an alignment member 200 that covers the case 10 from above. As shown in FIG. 7, these components are assembled with the central axes of the respective members superimposed on each other in the vertical direction.

Then, the first top wall groove 226 and the first bottom wall groove 228 of the slider 220 are slid while moving the shaft core 31 in the horizontal direction. At this time, the knurl 240 is arranged inside the slider 220 and the pinion gear 50 is arranged outside the slider 220 . Further, the axial center 41 is slid in the second ceiling wall groove 227 and the second bottom wall groove 229 while moving in the horizontal direction. At this time, the roller portion 42 is arranged inside the slider 220 . Then, the slider 220 and the carrier 260 with internal teeth are relatively moved so that the internal gear 261 provided on the carrier 260 with internal teeth and the pinion gear 50 mesh with each other.

After that, the base 70 is placed under these members, and the case 10 is covered from above so that the protrusions 230 of the slider 220 pass through the grooves 118 of the case 10 . At this time, the coil spring SP provided in the slider 220 contacts the inner peripheral wall of the case 10, and the slider 220 is urged forward. Then, the first engaging groove 111a and the second engaging groove 111b provided in the case 10 and the first engaging plate portion 701a and the second engaging plate portion 701b provided in the base 70 are engaged with each other, and the case 10 and the base 70 are fixed.

Finally, the aligning member 200 is put on the housing composed of the case 10 and the base 70 from above. Then, the claws provided on the aligning member 200 are engaged with the engagement holes 19 provided on the case 10 to fix the aligning member 200 and the case 10 .

After completing the assembly of the speed reduction mechanism 100, the two lifting cords 3 are arranged. The two lifting cords 3 are arranged above the alignment member 200 or are inserted through the inside of the alignment member 200 . Then, the lifting cords 3 are passed through the guide grooves 113 provided on the front and rear sides of the case 10 and the through holes 225 provided on the front and rear sides of the slider 220, and the assembly of the speed reduction mechanism 100 is completed.

1.3. Lower Limit Position Determining Means The panel lifting device 1 of this embodiment uses the code equalizer 7 as lower limit position determining means for determining the lower limit position of the panel 4 in the vertical direction. After the panel 4 is lifted, when the operating portion 8 is operated to unlock the lifting cords 3 by the locking portion 9, the panel 4 starts to descend under its own weight, and the lifting cords 3 pulled out from the head box 2 accordingly. is pulled back into the headbox 2 . After that, when the panel 4 reaches the lower limit position as shown in FIG. 1, the cord equalizer 7 comes into contact with the head box 2, thereby restricting the further descent of the panel 4 and stopping the panel 4 at an appropriate position. can. The lower limit position determining means is not limited to the above-described configuration, and for example, a component other than the cord equalizer 7 may be provided on the lifting cord 3 and brought into contact with the head box 2 .

1.4. Lower limit position adjusting means 20
As shown in FIGS. 1 and 2, the panel lifting device 1 of this embodiment includes lower limit position adjusting means 20 for adjusting the lower limit position of the panel 4 in the vertical direction. The lower limit position adjusting means 20 is configured to be able to adjust the length of the lifting cord 3, and as shown in FIGS. 20e and a cylindrical portion 20f. The pressing portion 20d is urged by a spring 20e, and pushes the projection 20a inward against the urging force of the spring 20e to slide inside the cylindrical portion 20f. The second passage hole 20c penetrates from the upper surface to the lower surface of the lower limit position adjusting means 20 in a state where the projection 20a is pushed.

One end of the lifting cord 3 suspended from the head box 2 is inserted through the insertion hole 4a of the panel 4 after passing through the first passage hole 20b. Further, the projection 20a is pulled upward through the second passage hole 20c penetrating in the vertical direction.

In the locked state of the lower limit position adjusting means 20 shown in FIG. 19A, the pressing portion 20d presses the lift cord 3 in the second passage hole 20c due to the biasing force of the spring 20e. When the protrusion 20a is pushed in against the biasing force of the spring 20e from this state, the pressing of the lifting cord 3 by the pressing portion 20d is released as shown in FIG. Penetrates to the bottom. In this state, as shown in FIG. 19C, by pulling out one end of the lifting cord 3 above the second passage hole 20c, the lower limit position of the panel 4 can be lifted in the vertical direction. When the protrusion 20a is released, the lifting cord 3 in the second passage hole 20c is again pressed by the pressing portion 20d and locked as shown in FIG. 19D. Further, by performing the reverse operation, the lower limit position of the panel 4 can also be lowered in the vertical direction. By providing such a lower limit position adjusting means 20, the lower limit position of the panel 4 can be finely adjusted in accordance with changes in usage conditions, for example, changes in the height of a stand positioned below the panel 4. .

It should be noted that the lower limit position adjusting means 20 is not limited to the configuration described above, and other configurations may be employed as long as one end of the lifting cord 3 can be locked at an arbitrary length.

1.5. Operation of Panel Lifting Device 1 In the panel lifting device 1 of this embodiment, the reduction mechanism 100 applies a braking force to the forward movement of the lifting cord 3 in FIG. The reduction mechanism 100 does not apply braking force to the rearward movement of the lifting cord 3 in FIG.

<Steady state>
As shown in FIG. 1, when the cord equalizer 7 is in contact with the head box 2 and the panel 4 is stopped at the lower limit position, the lifting cord 3 is in a state of not moving in the longitudinal direction (steady state). In a steady state, the slider 220 of the speed reduction mechanism 100 is biased forward by the coil spring SP and positioned forward of the case 10 . Therefore, the tension transmission roller 30 and the idle roller 40 are also positioned forward, but the distance between the first ceiling wall groove 16 and the second ceiling wall groove 17 decreases toward the front, so that the knurls 240 and the knurls 240 The distance between the roller portions 42 is also reduced. As a result, the knurls 240 are pressed against the rollers 42 , and the lifting cords 3 are sandwiched between the knurls 240 and the rollers 42 .

<Non-braking state>
When the operating portion 8 is pulled downward from the steady state as described above, each lifting cord 3 moves in one longitudinal direction (rearward with respect to the reduction mechanism 100). Along with this movement, the tension transmission roller 30 and the idle roller 40 move rearward, but the first ceiling wall groove 16 and the second ceiling wall groove 17 that guide the shaft cores 31 and 41, respectively, move rearward. The distance between the knurls 240 and the rollers 42 also increases as they move toward each other. The clamping force of the knurls 240 and the rollers 42 on the lifting cord 3 is weakened, the transmission of rotation to the tension transmission roller 30 is suppressed, and the lifting cord 3 can be pulled without receiving braking force (non-braking state). ). When the panel 4 rises to an appropriate position, pulling the operation part 8 downward again and releasing the hand, the lifting cord 3 is locked by the lock part 9 immediately after the panel 4 has slightly dropped by its own weight, and stops. In this state, the lifting cord 3 is sandwiched between the knurls 240 and the roller portion 42 again.

<Brake state>
When the operating portion 8 is further pulled downward and the hand is released, the lifting cords 3 are unlocked and the panel 4 starts to descend under its own weight. forward). The knurls 240 and the roller portions 42 rotate due to the frictional force generated between the lifting cords 3 and the knurls 240 , and the pinion gear 50 also rotates (rotates) with the rotation of the knurls 240 . At this time, the tension transmission roller 30 and the idle roller 40 move forward, and the shaft cores 31 and 41 are guided by the first ceiling wall groove 16 and the second ceiling wall groove 17, respectively, and approach each other in the left-right direction. Therefore, the clamping force of the lifting cord 3 between the knurling 240 and the roller portion 42 is increased, and the knurling 240 reliably rotates according to the movement of the lifting cord 3 .

When the knurl 240 and the pinion gear 50 connected thereto rotate, the pinion gear 50 meshes with the internal gear 261, so the carrier 260 with internal teeth also rotates (rotates). The planetary gear 280 thus rotated also rotates (revolves). Since the planetary gear 280 meshes with the sun gear 323 and the inner peripheral gear 115 fixed by the case 10, the planetary gear 280 rotates in the direction opposite to the direction of revolution. The sun gear 323 meshing with 280 also rotates. At this time, the rotation of the sun gear 323 is accelerated by the planetary gear 280, and the weight 340 held by the sun gear-equipped weight holder 320 that rotates together with the sun gear 323 also starts rotating.

Then, the weight 340 abuts against the inner peripheral wall of the case 10 due to centrifugal force, and a resistance force against rotation is generated. When the moving speed of the lifting cord 3 increases, the rotational speed increases, thereby increasing the centrifugal force. When the centrifugal force increases, the weight 340 contacts the inner peripheral wall of the case 10 more strongly, increasing the resistance. As a result, the moving speed of the lifting cord 3 when the panel 4 is lowered can be reduced.

16A and 16B are conceptual diagrams for explaining the relationship of forces applied to the lifting cords 3 when the panel 4 is lowered. While the panel 4 is being lowered, a constant tension F1 is applied to the lifting cord 3 along the longitudinal direction by the weight of the panel 4 itself. If the deceleration mechanism 100 were not installed, the panel 4 would fall freely, and the descent speed would monotonously increase as the panel 4 descended. When the speed reduction mechanism 100 according to the present embodiment is installed, a resistance force F2 is applied by the speed reduction mechanism 100 along the longitudinal direction of the lifting cord 3 in a direction opposite to the tensile force F1. Immediately after the panel 4 starts to descend, the tension F1 is greater than the resistance force F2, and the descending speed of the panel 4 rapidly increases. After that, as the descending speed of the panel 4 increases, the resistance F2 increases, the acceleration of the panel 4 decreases accordingly, and the increase in descending speed becomes gradual. When the tensile force F1 and the resistance force F2 are balanced (when the vertical position of the panel reaches X in FIG. 16B), the lowering speed of the panel 4 stops increasing and becomes substantially constant. In this way the panel 4 can be lowered slowly and safely.

When the size and thickness of the panel 4 are large, the descending speed of the panel 4 may not be sufficiently reduced if the resistance F2 is insufficient against the tension F1 due to the weight of the panel 4 itself. In particular, when the rise of the resistance F2 is slow immediately after the start of the descent of the panel's own weight (in other words, in FIG. 16B, when the resistance F2 rises slowly until the panel starts to descend from the upper limit position and reaches the position X) ), there is a risk that the panel 4 will descend without reducing the descending speed while the tensile force F1 is large relative to the resistance force F2. In the speed reduction mechanism 100 according to the present embodiment, the speed ratio of the sun gear 323 to the rotation of the planetary gear 280 is (the number of teeth of the sun gear 323 + the number of teeth of the internal gear 261)/(the number of teeth of the sun gear 323). By appropriately setting this speed ratio according to the weight of the panel 4, a sufficient resistance force F2 can be achieved in a short time after the panel starts to descend under its own weight. Also, the resistance F2 may be adjusted by appropriately setting the weight or number of the weights 340 . On the other hand, when the speed reduction mechanism 100 is composed of an oil damper, a sufficient resistance F2 can be achieved by using a fluid having an appropriate viscosity according to the weight of the panel 4. FIG.

When the speed reduction mechanism 100 is installed in the head box 2, the front-rear direction (the width direction in FIG. 1) of the speed reduction mechanism 100 is such that the lift cord 3 is pinched when the panel 4 is pulled up by pulling the operation unit 8 downward. is released, the operation part 8 is released, and the lifting cord 3 is clamped when the panel 4 is lowered by its own weight. That is, the direction in which the lifting cord 3 moves forward in FIG. 1, the locking portion 9 is arranged on the left side in the width direction with respect to the reduction mechanism 100. As shown in FIG.

By assembling the speed reduction mechanism 100 in such a direction, when the operating portion 8 is pulled downward to lift the panel 4, the tension transmission roller 30 and the idle roller 40 are separated from each other. It can be pulled by force. On the other hand, when the lifting cord 3 is released in a state in which the panel 4 is not completely lowered and the lifting cord 3 is not locked by the lock portion 9, the panel 4 tends to descend under its own weight. At this time, the deceleration mechanism 100 applies a braking force to the lifting cord 3, so that the lowering speed of the panel 4 is reduced.

2. Second Embodiment 2.1. Overall Configuration Next, a panel lifting device 1 according to a second embodiment will be described with reference to FIGS. 20 and 21. FIG. The panel lifting device 1 according to the second embodiment is provided with upper limit position determination means for determining the upper limit position of the panel 4 in the vertical direction, and the lifting cord 3 is configured to be separable in the middle. Furthermore, it differs from the first embodiment in that a reinforcing member 4b is attached to the upper end of the panel 4. FIG. The differences will be described below.

2.2. Upper Limit Position Determining Means The panel lifting device 1 of this embodiment includes a spherical stopper 21 on the lifting cord 3 as upper limit position determining means for determining the upper limit position of the panel 4 in the vertical direction. As shown in FIG. 20, the stopper 21 is provided on the lifting cord 3 suspended from the headbox 2 and connected to the panel 4 at one end, between the headbox 2 and the one end. 20, in which the panel 4 is at the lower limit position, the operating portion 8 is operated to raise the panel 4, the stopper 21 comes into contact with the head box 2 as shown in FIG. be. When the panel 4 reaches the upper limit position in this way, when the operation part 8 is released, the lifting cord 3 is locked by the lock part 9 immediately after the panel 4 is slightly lowered by its own weight, and the panel 4 stops.

By providing such an upper limit position determining means, it is possible to stably secure a minimum required gap when the panel 4 is raised for delivery of goods.

In the present embodiment, the spherical stopper 21 abutting against the head box 2 is used as the upper limit position determining means, but the upper limit position determining means is not limited to the above-described structure, and the movement of the lifting cord 3 is kept constant. It is sufficient if the range can be regulated.

2.3. Configuration of Lifting Cord 3 The stopper 21 used as the upper limit position determining means, as shown in FIGS. A lower elevating cord 3a including one end of the cords 3 connected to the panel 4 and an upper elevating cord 3b arranged vertically above the lower elevating cord 3a are separably connected. A first member 21a located vertically below the lifting cord 3 hanging from the head box 2 is connected to the lower lifting cord 3a, and a screw hole 21b2 is formed in the upper surface of the first member 21a. ing. The second member 21b positioned above the first member 21a in the vertical direction is connected to the upper lifting cord 3b, and a screw portion 21b1 corresponding to the screw hole 21b2 is formed on the lower surface of the second member 21b. . By screwing and separating the threaded portion 21b1 and the screw hole 21b2, the lower lifting cord 3a and the upper lifting cord 3b can be connected and separated.

By configuring the lifting cord 3 to be separable into the upper lifting cord 3b and the lower lifting cord 3a, maintenance such as cleaning and replacement of the panel 4 is facilitated, and panels of different sizes can be used according to changes in usage conditions. 4 can be easily changed.

In this embodiment, the lower lifting cord 3a and the upper lifting cord 3b are separably connected at the stopper 21 as the upper limit position determining means. Separation and connection positions are not limited to this configuration, and a separate component may be provided as a connection means at another position on the lifting cord 3 and connected in a separable manner. Also, the means for connecting the lower elevating cord 3a and the upper elevating cord 3b is not limited to those using the screw structure as described above, and any means capable of realizing a separable connection can be applied.

2.4. Reinforcing material 4b
As shown in FIGS. 20 and 21, a reinforcing member 4b is attached to the upper end of the panel 4 of this embodiment from the left end to the right end in the width direction. The reinforcing member 4b is for suppressing the warp and bending of the panel 4. By attaching the reinforcing member 4b, even if the panel 4 is relatively thin, it can be lifted and lowered stably while maintaining its flat shape. It becomes possible to The material of the reinforcing member 4b is not particularly limited, and for example, plastic or metal can be used.

3. Other Embodiments The present invention can also be implemented in the following aspects.
In the above-described embodiment, the panel 4 is lifted by pulling out the lifting cord 3 from the head box 2, and the panel 4 is lowered by pulling the lifting cord 3 back into the head box 2 by the weight of the panel 4. , the movement of the lifting cord 3 can be realized by other configurations. For example, one end of the lifting cord 3 is connected to the panel 4, the other end is connected to a winding shaft mounted inside the head box 2, and the lifting cord 3 is wound up and unwound by rotating the winding shaft. By doing so, the panel 4 may be raised and lowered.

The operation unit 8 can be appropriately configured according to the moving method of the lifting cord 3 . For example, when the lifting cord 3 is moved by winding and rewinding with respect to the winding shaft as described above, a loop-shaped operation cord is attached to an operation pulley rotatably attached in the head box 2, and the operation cord is attached to the operation pulley. By operating , the operating pulley is rotated, and by transmitting the rotation to the winding shaft, the winding shaft is rotated and the lifting cord 3 can be wound.

The configuration of the speed reduction mechanism 100 is not limited to the configuration of the embodiment described above. For example, in the above-described embodiment, the resistance applying portion RA of the speed reduction mechanism 100 is configured by a centrifugal governor, but it may be configured by another configuration, for example, by an oil damper. When an oil damper is used, the movement of the lifting cord 3 is converted into rotary motion by the motion conversion unit DT, and then the rotary motion is transmitted to a moving member installed in the viscous fluid (oil), and the moving member moves the viscous fluid. Resistance can be imparted by moving or rotating through it to create viscous resistance.

Further, the structure of the reduction mechanism 100 can be appropriately configured according to the movement method of the lifting cord 3 . In the above-described embodiment, since the lifting cord 3 moves by linear motion within the head box 2, the motion converting section DT that converts the movement into rotary motion is introduced into the reduction mechanism 100. FIG. On the other hand, when the lifting cord 3 is moved by winding and unwinding on the winding shaft, it is also possible to adopt a configuration in which the rotational motion of the winding shaft is directly transmitted to the speed reduction mechanism 100 (without going through the motion converting section DT). It is possible.

The upper limit position determination means and the lower limit position determination means are not limited to the configurations of the above-described embodiments, and can be realized by other configurations. For example, when the lifting cord 3 is moved by winding and unwinding with respect to the winding shaft as described above, it is provided with a screw shaft, a moving member that moves along the screw shaft, and a contact portion that can come into contact with the moving member. A limit device is provided to rotate the screw shaft as the winding shaft rotates to move the moving member, and when the moving member comes into contact with the abutting portion, the rotation of the screw shaft stops and the rotation of the winding shaft stops accordingly. You may make it stop the panel 4 in a desired upper limit position or a lower limit position by comprising so that it may stop.

The present invention is not limited to the above-described embodiments, and various modifications and changes are possible within the scope of the gist of the invention.

1: panel lifting device, 2: head box, 3: lifting cord, 3a: lower lifting cord, 3b: upper lifting cord, 4: panel, 4a: insertion hole, 4b: reinforcing member, 5: supporting member, 6: base, 7: code equalizer, 8: operation part, 9: lock part, 10: case, 11: top wall part, 12a: inner wall surface, 12b: rear wall part, 12f: front wall part, 12l: left side wall part, 12r: right side wall portion, 13: collar portion, 13C: cylindrical portion, 15d: inner wall, 16: first ceiling wall groove, 16a: first guide wall, 17: second ceiling wall groove, 17a: second guide wall, 19: engagement hole, 20: lower limit position adjusting means, 20a: projection, 20b: first passage hole, 20c: second passage hole, 20d: pressing portion, 20e: spring, 20f: cylindrical portion, 21: stopper, 21a : first member, 21b: second member, 21b1: screw portion, 21b2: screw hole, 30: tension transmission roller, 31: shaft center, 40: idle roller, 41: shaft center, 42: roller portion, 50: pinion Gear 70: Base 81: Operation Cord 82: Operation Equalizer 100: Reduction Mechanism 111a: First Engagement Groove 111b: Second Engagement Groove 112: Cover Part 113: Guide Groove 114: Support groove 115: inner peripheral gear 118: groove 200: alignment member 220: slider 221: top wall portion 222: rear wall portion 223: bottom wall portion 224: front wall portion 225: through hole , 226: first top wall groove, 227: second top wall groove, 228: first bottom wall groove, 229: second bottom wall groove, 230: projection, 231: recess, 240: knurl, 241: washer, 260 : carrier with internal teeth, 261: internal gear, 262: flange, 263: support shaft, 264: cylindrical portion, 280: planetary gear, 300: plate, 320: weight holder with sun gear, 321: convex portion, 322: concave portion , 323: sun gear, 324: ring portion, 340: weight, 341: projection, 701a: first engaging plate portion, 701b: second engaging plate portion, 702: mounting cylinder, 706: first base groove, 707: second 2 base groove, 708: cylindrical portion, DT: motion conversion portion, RA: resistance applying portion, SP: coil spring

Claims (7)

A panel lifting device,
Equipped with a lifting cord, a panel, an operation unit, and a reduction mechanism,
The panel is connected to the lifting cord, and is lifted and lowered by operating the operation unit to move the lifting cord,
The panel can be lowered by its own weight,
The panel elevating device, wherein the deceleration mechanism is configured to reduce the weight-lowering speed of the panel. The panel lifting device according to claim 1,
The panel lifting device, wherein the panel is a transparent panel. The panel lifting device according to claim 1 or claim 2,
A panel lifting device further comprising upper limit position determining means for determining an upper limit position of the panel in the vertical direction. The panel lifting device according to claim 3,
Equipped with a headbox,
one end of the lifting cord suspended from the headbox and connected to the panel;
The upper limit position determining means is a stopper provided between the head box and the one end on the lifting cord,
The panel lifting device, wherein the stopper abuts against the head box when the panel rises to the upper limit position. The panel lifting device according to any one of claims 1 to 4,
The elevating cord has one end connected to the panel, and includes a lower elevating cord including the one end, and an upper elevating cord arranged above the lower elevating cord,
A panel lifting device, wherein the lower lifting cord and the upper lifting cord are detachably connected. The panel lifting device according to any one of claims 1 to 5,
A panel lifting device further comprising lower limit position determination means for determining a lower limit position of the panel in the vertical direction. The panel lifting device according to any one of claims 1 to 6,
A panel lifting device, wherein the lifting cord includes lower limit position adjusting means for adjusting a lower limit position of the panel in the vertical direction.

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